Particle removal device for portable power grinders and the like



June 21, 1966 sugo ov c 3,256,648

PARTICLE REMOVAL DEVICE FOR PORTABLE POWER GRINDERS AND THE LIKE FiledJuly 1.7, 1965 INVENTOR DANIEL. B. SUBONOVI CH United States Patent3,256,648 PARTICLE REMGVAL DEVICE FOR PORTABLE POWER GRINDERS AND THELIKE Daniel B. Subonovich, Hamilton, Ontario, Canada, as-

signor of one-half to Douglas A. Rice, Burlington, 0n-

tario, Canada Filed July 17, 1963, Ser. No. 296,161 4 Claims. (Cl.51-273) The present invention relates to a dust collecting attachmentfor portable sanders and the like and it consists in the combinations,constructions and arrangements of parts hereinafter to be described andclaimed.

Generally there is provided a device which may be quickly and easilyattached to a conventional sander, grinder or the like. It consists of ahood or housing having a circular top and a dependent side wall theforward portion of which is relatively shallow and the rearward portionof which is relatively deep. Extending downwardly from the lower edge ofthe side wall is an accordion pleated skirt of flexible material. Afitting extends substantially radially and upwardly from the largerportion of the side wall and its entrance is guarded by a coarse screenor the like. The fitting is adapted to connect to the hose of aconventional vacuum cleaner or the like. A novel ball and socketconnecting means is provided for attaching the device to the motor ofthe grinder, sander or the like. The device is such that it Will quicklyand easily and constantly remove dust and other particles formed by theoperation of the sander, grinder, or like instrument upon which it isused.

It is accordingly an obejct of the invention to provide a novel dustcollecting attachment for portable sanders and the like.

Still another object of the invention is to provide a device of thecharacter set forth which is simple inconstruction, inexpensive tomanufacture and yet eifective and desirably eflicient in use.

A further object of the invention is to provide, in a device of thecharacter set forth, a novel universal mounting forming a part of theinvention.

Still another object of the invention is to provide, in a device of thecharacter set forth, a novel flexible skirt forming a part of theinvention.

Other and further objects of the invention will become apparent from areading of the following specification taken in conjunction with thedrawing, in which:

FIGURE 1 is a fragmentary bottom plan view of an embodiment of theinvention,

FIGURE 2 is a side elevational view, partly broken away, of the deviceshown in operative position upon a sander, and

FIGURE 3 is a reduced sideelevati-onal view showing the device ininoperative position upon a sander.

Referring more particularly to the drawing, there is shown therein adust collecting attachment for portable sanders and the like comprisinga housing having a circular top provided with a dependent side wallstructure 11 of cylindrical shape having its forward portion cut away asindicated at 12, the wall 11 becoming gradually deeper as it reaches itsrearmost portion 13.

Extending downwardly from the lower edges of the wall 11 is an accordionpleated skirt 14 of flexible material such as rubber, leather, plasticmaterial or the like.

The top 10 is centrally provided with an opening 15 from which upwardlyextends a hollow partial ball 16 mounted for movement within a socket 17the upper end of which is integrally connected with a collar 18 into3,256,648 Patented June 21, 1966 which extends a set screw 19, thecollar 18 being positioned upon a reduced portion 20 of a motor 21.

The motor 21 is provided with a drive shaft 22 upon the lower end ofwhich is shown a circular sander 23.

An opening 24 is provided in the rear portion of the wall 11 and afitting 25 encompasses the same and extends upwardly and substantiallyradially therefrom. The fitting 25 terminates in a circular pipe section26 which is adapted to be connected to the hose (not shown) of a vacuumcleaner. The opening 24 is provided with a guard 27 of coarse screen orthe like.

In operation, it will be apparent that the device may be quickly andeasily mounted upon the motor by placing the collar 18 over the reducedportion 20 thereof and thereafter tightening the set screw 19. It willbe seen that the housing 10 will now substantially cover the sandingtool 23 and that the skirt 14 will come to bear, when the sander 23 isbeing applied, for example, to a floor 30 or the like to likewise bearagainst the floor 30 or other work and that the housing will move alongwith the skirt to accommodate curvular work pieces and the like. It willbe understood that when the motor 21 is operated to revolve the sander23 that the vacuum device (not shown) will also be operated to provide apartial vacuumthrough the pipe section 26 and fitting 25 to withdraw airfrom within the housing 10 through the guard 27 thereby withdrawing allloose particles caused by the action of the sander 23, it beingunderstood that fresh air will enter through the cut away portion 12 ofthe housing during this operation. It will also be apparent that anylarge pieces of material dislodged by the sander 23 or pieces of sandingpaper torn therefrom will be prevented from passing through the fitting25 into the vacuum device by the action of the guard member 27.

While but one form of the invention has been shown and described herein,it will be readily apparent to those skilled in the ant that many minormodifications may be made without departing from the spirit of theinvention or the scope of the appended claims.

What is claimed is:

1. In combination with a portable tool having a motor, a shaft extendingtherefrom and a tool carried by said shaft; the provision of a dustcollecting attachment for said tool comprising an open bottom housingsurrounding said tool and shaft, said housing including a portion beingformed of flexible material; means for attaching said housing aroundsaid shaft comprising a socket, a collar aflixed to said socket andsurrounding a portion of said motor, a set screw extending through saidcollar to bear against said motor; a hollow partial ball affixed to saidhousing around said motor shaft and positioned in said socket and meansfor connecting said housing to a vacuum device on one side of saidhousing, and a window cut in said housing on a side remote from saidconnecting means.

2. A device as claimed in claim 1 including an accordion pleated skirtportion on said housing and a vacuum attachment fitting extending fromone side of said housing.

3. A device as defined in claim 2 wherein a screen is mounted in saidhousing at the entrance to said fitting.

4. In combination with a portable tool having a motor, a shaft extendingtherefrom and a tool carried by said shaft; the provision of a dustcollecting attachment for said tool comprising an open bottom housingsurrounding said tool and shaft; said housing including a portion beingformed of flexible material; releasable means for attaching said housingaround said shaft; manually operable locking means extending throughsaid releasable 3 means for locking same in position; a hollow partialspherical socket affixed to said releasable means and a hollow partialball aifixed to said housing and fitting within said socket for slidingengagement therewith.

References Cited by the Examiner UNITED STATES PATENTS 1,086,368 2/1914Huyck 51177 1,945,031 1/ 1934 Decker 51170.2 2,764,852 10/1956 Emmons51-273 X 2,944,465 7/ 1960 Jones 51-273 X 4 FOREIGN PATENTS 1,052,2623/1952 France. 1,068,145 10/1959 Germany. 0 1,085,064 7/1960 Germany.

533,964 2/1941 Great Britain.

548,531 9/1956 Italy.

ROBERT C. RIORDON, Primary Examiner.

10 J. SPENCER OVERHOLSER, LESTER M. SWINGLE,

Examiners.

1. IN COMBINATION WITH A PORTABLE TOOL HAVING A MOTOR, A SHAFT EXTENDINGTHEREFROM AND A TOOL CARRIED BY SAID SHAFT; THE PROVISION OF A DUSTCOLLECTING ATTACHMENT FOR SAID TOOL COMPRISING AN OPEN BOTTOM HOUSINGSURROUNDING SAID TOOL AND SHAFT, SAID HOUSING INCLUDING A PORTION BEINGFORMED OF FLEXIBLE MATERIAL; MEANS FOR ATTACHING SAID HOUSING AROUNDSAID SHAFT COMPRISING A SOCKET, A COLLAR AFFIXED TO SAID SOCKET ANDSURROUNDING A PORTION OF SAID MOTOR, A SET SCREW EXTENDING THROUGH SAIDCOLLAR TO BEAR AGAINST SAID MOTOR; A HOLLOW PARTIAL BALL AFFIXED TO SAIDHOUSING AROUND SAID MOTOR SHAFT AND POSITIONED IN SAID SOCKET AND MEANSFOR CONNECTING SAID HOUSING TO A VACUUM DEVICE ON ONE SIDE OF SAIDHOUSING, AND A WINDOW CUT IN SAID HOUSING ON A SIDE REMOTE FROM SAIDCONNECTING MEANS.